(I was presented with this by the boss a couple of days ago, as it was my sole contribution to a massive project we worked on. I made the suggestion that busy cycle commuters might be more prepared to stop and take a survey if there was an incentive to do so, and after a poll of cyclists in the office, it was concluded that granola was the “carrot” (look at my use of psychological buzzwords there) that would tempt the most people).